package com.bowen.springcloud.service.impl;

import cn.hutool.core.util.IdUtil;
import com.bowen.springcloud.service.PaymentService;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Service;

import java.util.concurrent.TimeUnit;

@Service
public class PaymentServiceImpl implements PaymentService {

	/**
	 * 正常访问，肯定OK
	 * @param id
	 * @return
	 */
	@Override
	public String paymentInfo_OK(Integer id) {
		return "线程池："+Thread.currentThread().getName()+"paymentInfo_OK,id:"+id+"\t"+"O(∩_∩)O";
	}

	@Override
	@HystrixCommand(fallbackMethod = "paymentInfo_TimeOutHandler",commandProperties = {
			@HystrixProperty(name="execution.isolation.thread.timeoutInMilliseconds",value = "3000")
	})
	public String paymentInfo_TimeOut(Integer id) {
		//延迟5秒
		int timeNum = 5;
		//int age = 10/0;
		try{
			TimeUnit.SECONDS.sleep(timeNum);
		}catch(InterruptedException e) {
			e.printStackTrace();
		}
		return "线程池："+Thread.currentThread().getName()+"paymentInfo_TimeOut,id:"+id+"\t"
				+"O(∩_∩)O,耗时"+timeNum+"秒";
	}

	public String paymentInfo_TimeOutHandler(Integer id) {
		return "线程池："+Thread.currentThread().getName()+"paymentInfo_TimeOutHandler,id:"
				+id+"\t"+"访问超时了，请稍后再试吧";
	}

	//服务熔断
	@HystrixCommand(fallbackMethod = "paymentCircuitBreaker_fallback",commandProperties = {
			@HystrixProperty(name = "circuitBreaker.enabled",value = "true"), //是否开启断路器
			@HystrixProperty(name = "circuitBreaker.requestVolumeThreshold",value = "10"), //请求次数
			@HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds",value = "10000"), //时间窗口期
			@HystrixProperty(name = "circuitBreaker.errorThresholdPercentage",value = "60"), //失败率达到多少后跳闸
	})
	@Override
	public String paymentCircuitBreaker(Integer id) {
		if(id<0) {
			throw new RuntimeException("id不能为负数！");
		}
		String serialNumber = IdUtil.simpleUUID();
		return Thread.currentThread().getName()+"\t"+"调用成功，流水号:"+serialNumber;
	}
	public String paymentCircuitBreaker_fallback(Integer id) {
		return "id不能为负数，请稍后再试";
	}
}